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Training neural networks using limited annotations is an important problem in the medical domain. Deep Neural Networks (DNNs) typically require large, annotated datasets to achieve acceptable performance which, in the medical domain, are…

Computer Vision and Pattern Recognition · Computer Science 2024-10-28 Bethany H. Thompson , Gaetano Di Caterina , Jeremy P. Voisey

Fully convolutional networks (FCN) have achieved great success in human parsing in recent years. In conventional human parsing tasks, pixel-level labeling is required for guiding the training, which usually involves enormous human labeling…

Computer Vision and Pattern Recognition · Computer Science 2018-09-17 Zhonghua Wu , Guosheng Lin , Jianfei Cai

Weakly supervised video anomaly detection (WS-VAD) is to distinguish anomalies from normal events based on discriminative representations. Most existing works are limited in insufficient video representations. In this work, we develop a…

Computer Vision and Pattern Recognition · Computer Science 2021-04-06 Jia-Chang Feng , Fa-Ting Hong , Wei-Shi Zheng

While classic video anomaly detection (VAD) requires labeled normal videos for training, emerging unsupervised VAD (UVAD) aims to discover anomalies directly from fully unlabeled videos. However, existing UVAD methods still rely on shallow…

Computer Vision and Pattern Recognition · Computer Science 2022-06-22 Guang Yu , Siqi Wang , Zhiping Cai , Xinwang Liu , Chuanfu Xu , Chengkun Wu

Deep neural network (DNN) based salient object detection in images based on high-quality labels is expensive. Alternative unsupervised approaches rely on careful selection of multiple handcrafted saliency methods to generate noisy…

Computer Vision and Pattern Recognition · Computer Science 2021-03-16 Duc Tam Nguyen , Maximilian Dax , Chaithanya Kumar Mummadi , Thi Phuong Nhung Ngo , Thi Hoai Phuong Nguyen , Zhongyu Lou , Thomas Brox

Surgical scene segmentation is fundamentally crucial for prompting cognitive assistance in robotic surgery. However, pixel-wise annotating surgical video in a frame-by-frame manner is expensive and time consuming. To greatly reduce the…

Computer Vision and Pattern Recognition · Computer Science 2022-07-21 Yang Yu , Zixu Zhao , Yueming Jin , Guangyong Chen , Qi Dou , Pheng-Ann Heng

Continual learning aims to learn new tasks incrementally using less computation and memory resources instead of retraining the model from scratch whenever new task arrives. However, existing approaches are designed in supervised fashion…

Computer Vision and Pattern Recognition · Computer Science 2021-08-03 Jiangpeng He , Fengqing Zhu

Weakly supervised video anomaly detection (WS-VAD) involves identifying the temporal intervals that contain anomalous events in untrimmed videos, where only video-level annotations are provided as supervisory signals. However, a key…

Computer Vision and Pattern Recognition · Computer Science 2026-03-03 Yu Wang , Shengjie Zhao

Anomaly detection (AD), separating anomalies from normal data, has many applications across domains, from security to healthcare. While most previous works were shown to be effective for cases with fully or partially labeled data, that…

Machine Learning · Computer Science 2022-08-08 Jinsung Yoon , Kihyuk Sohn , Chun-Liang Li , Sercan O. Arik , Chen-Yu Lee , Tomas Pfister

This paper investigates indoor point cloud semantic segmentation under scene-level annotation, which is less explored compared to methods relying on sparse point-level labels. In the absence of precise point-level labels, current methods…

Computer Vision and Pattern Recognition · Computer Science 2025-07-01 Lunhao Duan , Shanshan Zhao , Xingxing Weng , Jing Zhang , Gui-Song Xia

In weakly supervised video anomaly detection (WVAD), where only video-level labels indicating the presence or absence of abnormal events are available, the primary challenge arises from the inherent ambiguity in temporal annotations of…

Computer Vision and Pattern Recognition · Computer Science 2023-11-28 Yixuan Zhou , Yi Qu , Xing Xu , Fumin Shen , Jingkuan Song , Hengtao Shen

Though deep learning based scene text detection has achieved great progress, well-trained detectors suffer from severe performance degradation for different domains. In general, a tremendous amount of data is indispensable to train the…

Computer Vision and Pattern Recognition · Computer Science 2020-05-26 Yudi Chen , Wei Wang , Yu Zhou , Fei Yang , Dongbao Yang , Weiping Wang

Semi-supervised anomaly detection, which aims to improve the anomaly detection performance by using a small amount of labeled anomaly data in addition to unlabeled data, has attracted attention. Existing semi-supervised approaches assume…

Machine Learning · Statistics 2025-02-11 Hiroshi Takahashi , Tomoharu Iwata , Atsutoshi Kumagai , Yuuki Yamanaka

Video anomaly detection (VAD) systems often prioritize accuracy while overlooking privacy concerns, limiting their suitability for real-world deployment. We propose the Orthogonal Projection Layer (OPL), a lightweight module that removes…

Computer Vision and Pattern Recognition · Computer Science 2026-05-12 Lei Wang , Wenxiang Diao , Andrew Busch , Jun Zhou , Yongsheng Gao

In this research we propose a deep learning approach for detecting anomalies in videos using convolutional autoencoder and decoder neural networks on the UCSD dataset.Our method utilizes a convolutional autoencoder to learn the…

Computer Vision and Pattern Recognition · Computer Science 2023-11-09 Gopikrishna Pavuluri , Gayathri Annem

Weakly supervised video anomaly detection (WS-VAD) is a challenging problem that aims to learn VAD models only with video-level annotations. In this work, we propose a Long-Short Temporal Co-teaching (LSTC) method to address the WS-VAD…

Computer Vision and Pattern Recognition · Computer Science 2023-04-05 Shengyang Sun , Xiaojin Gong

In this paper, we explore a weakly supervised method for anomaly detection. Since annotating videos is time-consuming, we only look at weak video-level labels during training. This means that given a video, we know that it is either normal…

Computer Vision and Pattern Recognition · Computer Science 2026-05-14 Urvi Gianchandani , Praveen Tirupattur , Mubarak Shah

Consistency regularization-based methods are prevalent in semi-supervised learning (SSL) algorithms due to their exceptional performance. However, they mainly depend on domain-specific data augmentations, which are not usable in domains…

Machine Learning · Computer Science 2023-09-29 Matin Moezzi

While the mainstream research in anomaly detection has mainly followed the one-class classification, practical industrial environments often incur noisy training data due to annotation errors or lack of labels for new or refurbished…

Machine Learning · Computer Science 2024-11-26 Jiin Im , Yongho Son , Je Hyeong Hong

Weakly supervised semantic segmentation is a challenging task as it only takes image-level information as supervision for training but produces pixel-level predictions for testing. To address such a challenging task, most recent…

Computer Vision and Pattern Recognition · Computer Science 2019-11-20 Bingfeng Zhang , Jimin Xiao , Yunchao Wei , Mingjie Sun , Kaizhu Huang